Stiefel Laboratories is an American dermatological pharmaceutical company, with its global headquarters in Research Triangle Park, North Carolina. It makes products such as Duac and Oilatum. Stiefel was acquired by GlaxoSmithKline at a price of $2.9 billion. The company was founded in 1847 by John David Stiefel, Ferdinand von Hebra and Paul Unna, who initially created medicated soaps.